<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isColllaspe ? '64px':'200px'">
          <div class='toggle-button' @click='toggleCollapse'>|||</div>
          <!-- 侧边栏菜单区 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" :unique-opened='true' :collapse='isColllaspe' :collapse-transition='false' :router='true' :default-active='activePath'>
            <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for='item in menuList' :key='item.id'>    
              <!-- 一级菜单的模板区 -->
            <template slot="title">
                <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subItem.path" v-for='subItem in item.children' :key='subItem.id' @click='saveNavState("/"+subItem.path)'> 
                  <!-- 二级菜单的模板区 -->
                <template slot="title">
                    <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
                </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
    data() {
      return {
          // 左侧菜单数据
          menuList:[],
          iconObj:{
              '125':'iconfont icon-user',
              '103':'iconfont icon-tijikongjian',
              '101':'iconfont icon-shangpin',
              '102':'iconfont icon-danju',
              '145':'iconfont icon-baobiao'
          },
        //   是否折叠
          isColllaspe:false,
          // 被激活的链接地址
          activePath:''
      };
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
        //退出登录
        window.sessionStorage.clear();
        this.$router.push("/login");
        },
        // 获取所有的菜单
        async getMenuList(){
            const {data:res}=await this.$http.get('menus')
            if(res.meta.status!==200)return this.$message.error(res.meta.msg)
            this.menuList=res.data
            // console.log(res)
        },
        toggleCollapse(){   //菜单栏展开收起
            this.isColllaspe=!this.isColllaspe
        },
        saveNavState(activePath){     // 保持连接的激活状态
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
    }
};
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  color: #fff;
  align-items: center;
  padding-left: 0px;
  font-size: 20px;
  img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
  }
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
      border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    color: #FFF;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>